-LRB- CNN -RRB- -- A U.S. drone strike Wednesday morning killed at least 10 militants and injured 14 near the Afghan-Pakistani border , a Pakistani military official said .

The attack targeted militants in Afghanistan 's Nangarhar province , the official said , speaking on condition of anonymity .

It was n't immediately clear which militant group or groups were targeted .

Haroon Zarghoon , a spokesman of a armed resistance movement , Hizb-e-Islami Afghanistan , said his group was not affected . But , citing his group 's fighters in the region , he said one attack was in the Afghan province 's Nazyan district , 1 to 2 miles -LRB- 2 to 3 kilometers -RRB- from the border with Pakistan .

Targets included smugglers who had been using an alternate route for bringing goods to Pakistan on foot , Zarghoon said .

One strike occurred in Pakistan 's Tirah Valley , according to residents in the area . However , the Pakistani military official maintained that the attacks happened only in Afghanistan .

Afghanistan 's Nangarhar province borders Pakistan 's loosely governed tribal region .

Nine facts about armed drones

Attack on Afghanistan-Pakistan border police kills 3

A few hundred miles to the southwest , two suicide bombers and three other insurgents attacked a border police post in Afghanistan 's southern Kandahar province on Wednesday evening , killing three police officers and injuring five other people , Interior Ministry spokesman Sediq Sediqi said .

The Taliban claimed responsibility for the attack , Taliban spokesman Qari Yusuf Ahmadi said .

The two suicide bombers wore women 's burqas , Sediqi said . After they blew themselves up , police killed the other three attackers , he said .

The attack happened around 8 p.m. in Kandahar 's Spin Boldak district near the border with Pakistan .

CNN 's Aliza Kassim and Masoud Popalzai and journalist Saleem Mehsud contributed to this report .

@highlight

NEW : 3 border police officers killed in suicide-bombing attack , Afghan government says

@highlight

Strike hits Afghanistan 's Nangarhar province , near Pakistan border , official says

@highlight

Attack happened Wednesday morning in province 's Nazyan district